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Statement I: The driver of a moving car ...

Statement I: The driver of a moving car sees a wall in front of him. To avoid collision, he should apply brakes rather than taking a turn away from the wall.
Statement II: Frictional force is needed to stop the car or taking a turn on a horizontal road.

A

Statement I is true, statement II is true, Statement II is the correct explanation for statement I.

B

Statemet I is true, Statement II is true , Statement II is NOT the correct explanation for Statement I

C

Statement I is True, Statement II is False.

D

Statement I is False, Statement II is true

Text Solution

Verified by Experts

The correct Answer is:
B
Force needed when breaks are applied
`f_(1)=ma=(mv^2)/(d)`
(v: initial speed, d: distance from wall)
When turn is taken
`F_(2)=ma=(mv^2)/(d)`
Hence breaks must be applied.
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The driver of a car travelling at speed v suddenly sees a wall at a distance r directly infront of him. To avoid collision, should he apply the brakes or turn the car sharply away from the wall ? Give reason.

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Knowledge Check

  • The driver of a car-travelling at speed V suddenly sees a wall at a distance r directly infront of him. To avoid collision. He should :

    A
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    B
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    C
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    D
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    B
    Turn sharply
    C
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    D
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  • A car moving on a horizontal road may be thrown out of the road in taking a turn.

    A
    By the gravitational force
    B
    Due to lack of sufficient centripetal force
    C
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